Annual report pursuant to Section 13 and 15(d)

Derivatives Derivatives - Cash Flow Hedges (Details)

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Derivatives Derivatives - Cash Flow Hedges (Details) (Cash Flow Hedging [Member], USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Interest Rate Risk on Variable Rate Portfolios [Member]
    
Derivative [Line Items]    
Hedge Ineffectivenes and Amounts Excluded from Effectiveness Testing $ (3) [1],[2] $ 11 [1],[2]
Commodity contracts
    
Derivative [Line Items]    
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net (3) [1] 32 [1]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net $ 6 [1],[2] $ 25 [1],[2]
[1] There were no carrying values of hedging derivatives as of December 31, 2012 and 2011, and there were no gains (losses) in the year ended 2012, as all cash flow hedges were de-designated during the year ended December 31, 2011.
[2] Amounts are recorded in principal transactions.